Grinding-machine.



No. 767,383. PATUNTUU J.UU. 16, 1904. U. P. BUCK.

GRINDING MACHINE. VAPPLIUAVTIONv FILED JULY 9, 1903.

N0 MODEL.

2 SHEETS-SHEET 2.

Patented August 16, 1904.

ArnNr @unica VERTRUDE P. BUCK, OF AUBURN, MAINE.

GRlNDlNG-NIACHINE.

SPECIFICATION forming part of Letters Patent No. 767,383, dated August 16, 1904.

Application filed July 9, 1903. Serial No. 164,308. (No model.)

To @ZZ whom it uta/y concern:

Be it known that I, Vnnfrnunn P. BUCK, a citizen of the United States, and a resident of Auburn, in the county of Androscoggin and State of Maine, have invented certain new and useful Improvements in Grinding-h/Iachines, of which the following is a specification.

This invention is intended to provide a simple, compact, and practical device for grinding scissors and like articles which may be made and sold at a low price and may be properly and effectively operated by any one without requiring any special care or skill on the part of the operator.

My grinding-machine in its preferred form is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the complete machine. Fig. 2 is a top plan view thereof. Fig'. 3 is a section through the upper portion of the machine, taken on the line .fn a? in Fig. 2. Fig. 4 is a side elevation illustrating' a modification. Fig. 5 is a rear elevation of the upper portion of the machine.

The framework of my g'rinding-machine comprises an upright portion 2, herein shown as provided at its lower end with a clamp 3, whereby the machine may be detachably secured to the edge of a bench or table. At its upper end this upright portion Qhas journaled therein a short horiZontally-extending shaft 4, carrying a grinding-wheel 5, usually made of emery, and also carrying a pulley 6 for driving said wheel. Below the wheel 5 said upright 2 is provided with a cross portion 7, carrying two pins 8, which extend horizontally and parallel with the plane of the wheel 5, and on these pins is mounted to slide a carriage 9, which is guided to move toward and from the wheel 5 by said pins and is constantly pressed toward said wheel by means of coil-springs 10, each carried by one of the pins 8 and located between the carriage 9 and a cotter-pin 11, detachably inserted in the free end of the corresponding' pin 8. The length of the carriage 9 is a little greater than that of the scissor-blade or other article which is to be ground by the machine, and on the upper side of this carriage are supported fixed guide-rods 12, extending from end to end thereof. On these guide-rods is mounted to slide a second carriage 13, to which the scissor-blade or other article is secured for grinding. By preference this carriage 13 itself forms the lower jaw of' a clamp, the upper jaw of which is shown at 14, and may be provided with positioning and guiding pins 15, extending through the carriage 13 and carrying springs 16 between said jaws for the purpose of separating the latter. The jaws are drawn together or released, as desired, by means of a thumb nut 17, turning on a threaded bolt 18, which is secured to the carriage 13 and passes through the upper jaw 14. The clampingjaws are arranged to present the edge of the blade to be ground to the wheel 5 at an angle corresponding to the bevel, if any, of said blade. Thus for grinding scissors these jaws will have an inclination cory responding' tothe bevel usually given to the edges of scissors.

In operation a scissor-blade or other article to be ground is clamped to the carriage 13, with its edge located adjacent to the wheel 5 and extending substantially parallel with the axis thereof. The wheel 5 is then rotated, and said carriag'e is slowly moved lengthwise of the carriage 9, thus presenting successively every portion of the edge of the blade to the wheel 5, and inasmuch as the carriage 9 is continually pressed toward said wheel 5 by the springs 10 the edge of the blade being ground will be held in contact with said wheel regardless of the contour of the former, so that no changing of the position of the blade or skilful handling thereof is required for grinding the curved points usually found in such blades. The springs 10 are given such a degree of compression as to cause the grinding action to take place with the desired rapidity.

The carriage 13 and the blade carried thereby may be shifted lengthwise of the carriage 9 by hand, if desired, as with the construction shown in Fig. 4; butin order that the travel of the blade past the edge of the wheel 5 may be uniform I prefer to provide a feed mechanism for moving said carriage 13 lengthwise of the carriage 9, and to this end I journal a threaded rod 19 on the upper face of the carriage 9 near the ends of the latter, and I pro- IOO vide the carriage 13 with a half-nut 20, adapted to engage the threads on said rod 19. Said half-nut is preferably formed on or carried bythe inner end of a lever 21, which is loosely pivoted on one of the guide-rods 12 and is caused to slide thereon with the carriage 19 by means of downwardly-projecting lugs 22, secured to said carriage, between which lugs said lever is located. The inner end of the lever 21 is normally held against the threaded rod 19 by means of a spring 23; but by pressing down the exposed outerv end of said lever the half-nut 20 may be disengaged from the threaded rod 19 to permit the carriage 13 to be shifted by hand in either direction along the carriage 9. The rod 19 is continuously rotated by means of a counter-shaft 24, carried in suitable journals 25, secured to the under side of the carriage 9 and provided with a gear 26, meshing with a gear 27, secured to one end of said rod 19.

The grinding-wheel 5 may be driven by any suitable means, such as a hand-wheel 28, journaled at the end of an arm 29, extending laterally from the support 2 and belted directly to the pulley 6. The counter-shaft 24 is shown as driven by a short counter-shaft 30, journaled near the lower end of the framework of the machine and provided at its ends with pulleys 31 and 32, one of which is connected with a pulley 33 on the counter-shaft 24 by a belt 34 and the other of which is connected by a belt 35 with a pulley 36, carried by the hand- Wheel 28.

As thus constructed it will b e seen that the grinding-wheel 5 and the entire driving mechanisms are journaled on short shafts and occupy a narrow space in the direction of their axes, so that by removing the Cotter-pins 11 and taking off' the belt 34 from one of its pulleys thecarriage 9 and connected parts may be removed from the pins 8, and thus the entire machine is made capable of being packed within a very small compass without requiring any special skill in taking it apart or putting it together.

Wrhen the automatic feed above -described is employed, the operator has nothing to do but to clamp the blade to be ground to the carriage 13 with its edge projecting therefrom a short distance toward the wheel 5 and then to rotate the hand-wheel 28 until the edge of the blade has been carried past said wheel 5. The operator may then press down the outer end of the lever 21, thus disengaging' the half-nut 20 from the threaded rod 19 and shift the carriage 13 back along the carriage 9 by hand. It is thus possible to subject an edge to a number of successive grinding operations very quickly and easily.

I claim as my invention- 1. A grinding-machine comprising' a frame, a grinding-wheel carried thereby and means for rotating the same, a spring-pressed carriage movable toward and from the edge of said wheel, a second carriage movable longitudinally on the first-named carriage. and

'means for clamping a blade to said second carriage in position to be ground by said wheel.

2. In a grinding-machine, the combination of a frame carrying a grinding-wheel at its upper end, and means for rotating the latter, guide-pins secured to said frame and projecting laterally therefrom, a carriage detachably mounted to slide on said pins and means for pressing' the same toward the grinding-wheel, guide-rods secured to the top of said carriage and extending substantially parallel with the axis of the grinding-wheel, a second carriage mounted to slide on said guide-rods, and means for securing a blade to the latter carriage in position to b e ground by said wheel.

3. In a grinding-machine, the combination of a frame carrying a grinding-wheel at its upper end, means for rotatingI the latter, laterally extending guide -pins secured to said frame beneath said grinding-wheel, a springpressed carriage mounted to slide on said pins, said carriage being removable therefrom, guide-rods fixed to the upper side of said carriage and extending lengthwise thereof, a threaded rod extending parallel with said guide-rods and journaled on said carriage, a second carriage mounted to slide on said guiderods, means for detachably connecting said second carriage with said threaded rod, means for clamping a blade to said second carriage, and means for simultaneously rotating said threaded rod and grinding-wheel.

4. In a grinding-machine, the combination of a frame, a grinding-wheel carried thereby and means for rotating it, pins secured to said frame and projecting laterally therefrom, said frame, wheel, driving means and pins being located in adjacent parallel planes, a carriage detachably mounted on said pins and cxtend ing transversely with respect to the same, a second carriage mounted to slide longitudinally on said first carriage, means for pressing one of said carriages toward the grindingwheel, and means for clamping a blade to said second carriage.

5. In a grinding-machine, the combination of a frame, a grinding-wheel carried thereby and means for rotating it, guide-pins secured to said frame, a spring-pressed carriage detachably mounted on said pins and extending transversely thereof, a second carriage mounted to slide longitudinally on the first-named. carriage, and means for clamping a blade to said second carriage, means for moving said second carriage lengthwise of said first carriage, comprising a threaded rod journaled on said first carriage, a half-nut carried by` said second carriage, a counter-shaft journaled on said first carriage and provided with a gear meshing with a gear carried by said threaded rod, said counter-shaft being also provided with a pulley located substantially opposite said frame, and driving connections IOO IIO

TIS

between said pulley and the means for rotating the grinding-wheel, said frame, grindingwheel, pins and driving means being located in adjacent parallel planes.

6. In a grinding-machine, thecombination of a frame, a grinding-wheel carried thereby, a driving-wheel also carried thereby and driving connections between it and the grindingwheel, pins secured to said frame and projecting laterally therefrom, said frame, grinding-wheel, driving-wheel and pins being located in adjacent parallel planes, a springpressed carriage detachably mounted on said pins and extending' transversely with respect to the same, a second carriage mounted to slide lengthwise on the first carriage, means for clamping a blade to said second carriage, av

threaded rod journaled on said first carriage and extending parallel with the direction of thc movement of the second carriage, a halfnut carried by the second carriage and adapted to engage said threaded rod, and means for rotating said threaded rod comprising a counter-shaft journaled on said first carriage and geared to said threaded rod, and driving connections between said pulley and drivingwheel located in substantially thel same plane with the latter.

7. In a grinding-machine, the combination of a frame 2, a grinding-wheel 5 and means for rotating it, pins 8 extending laterally from said frame, a carriage 9 detachably mounted to slide on said pins 8, springs 10 located between said carriage and the free ends of said pins, guide-rods 12 secured to said carriage 9 and extending longitudinally thereof, a carriage 13 mounted to slide on said guide-rods, and means for detachably securing a blade to said carriage 13.

In a grinding-machine, the combination of a frame, a grinding-wheel carried thereby and means for rotating it, pins 8 secured to said frame and extending laterally therefrom, a carriage 9 detachably mounted to slide on said pins 8, guide-rods 12 secured to said carriage 9 and extending lengthwise thereof, a threaded rod journaled on said carriage 9, a counter-shaft 24 also journaled on said carriage 9 and extending from the center to one end thereof, driving connections between said counter-shaft and threaded rod, means for driving said counter shaft, a carriage 13 mounted to slide on said guide-rods and provided with a spring-pressed lever 21 carrying a half-nut 2() adapted to engage said threaded rod, and means for detachably clamping a blade to said carriage 13.

9. In a grinding-machine, the combination of a frame 2, a grinding-wheel 5, a drivingwheel 28, driving connections between said driving-wheel and grinding-wheel, pins 8 extending from said frame 2, a spring-pressed carriage 9 detachably mounted to slide on said pins 8 and provided with longitudinal guiderods 12, a threaded rod 19 journaled to rotate on said carriage, a counter-shaft 24 also journaled on said carriage, driving connections between said counter-shaft and threaded rod and also between said counter-shaft and said driving-wheel 28, a carriage 13 mounted to slide on said guide-rod and forming the lower jaw of a clamp, an upper clamping-jaw 14 located over said carriage 13, and means for forcing said jaws together.

In testimony whereof I have hereunto subscribed my name this 7 th day of July, 1903.

VERTRUDE P. BUCK.

Witnesses:

E. D. CHADWICK, JOSEPH T. BRENNAN. 

